Channeler



H. H. MERCER Marchr CHANNELER Filed July l2. 1922 ...nullfil Patented Mar. 6, 1928.

UNITED STATES PATENT'o HENRY H. MERCER, F oriAnEMON'r, NEW HAMPSHIRE, ASSIGNOE TO SULLIVAN MA- Y OHINERY COMPANY, A CORPORATION OE MASSACHUSETTS.

CHAN NELER.

' Application Vnieu July 12,

tion is to provide an improved channeling mechanism having anA improved adjustable control` mechanism forvarying the cushion` ing and the supply of air to the operating mechanism of the channeler toprevcnt overheating of the same. Other objects and advantagesof myinvention will hereinafter :more fully appear.

In the accompanyino drawings I have shown for purposes of illustration one form which my invention may assume in practice.

Fig. 1 is a detail vertical section, in elevation, through a channeler chopping engine provided with my` improvedmecha.- nism.

Fig. 2 is a detail section on the line 2-2 of Fig. 1.

Fig. 3 is a transverse 3-3 of Fig. 2.

Fig. 4 shows both a plan view and a side elevation of the spring constituting a part of my improved mechanism.

As the partswith which my improvement in channeling mechanisms isincorporated are in general old, it will be sufficient to describethem simply; It will'be`obser-ved that a crank shaft l, whichmay bemountedin any suitable manner `upon `a standard and driven by a usualmotor not shown, is consection On the line nected by a pair of' connecting rods 2jto trunnions 3 arranged at opposite sides of the lower head-4 of a cylinder 5, Tlie'cylinder 5 contains a piston 6 having a piston rod7 and tail rod 8 which are guidedin the opposite ends offthe cylinder. The piston rod 7 carries at its flower en d a gang of channeling 4tools `9V supported` Vin a suitable cross head 10. Asvinawell known construction, thefcylinder com rises alower head4 and' an upper headf12- 'etweenfwliich a relathe `hea s being connectedf'by a plurality partially l 1922. serial No. 574,406.

of tie rods 14 of which three are visible. The upper cylinder head l2 isl provided with a tubular extension 15 containing a" splitbushing 16 in whichV is guidedthe tail rod`8, and as the latter is not a tight lit for its opening 8 in the head 12, air may pass from the cylinder into the extension 15.` The upper end of the extension l5 preferably terminates in a tubular cap 17 havinga` perforatedend 17 through which air may' be ldischarged from the upper yend ofthe cylinder. The wall of thecylinder 13y is; traversed between its ends by a4 pair of lon'gi` tudinally spaced ports 1S andy 19 connected by a longitudinally extending bypass'passage 20. The lower cylinderr head 4 is provided withV one o'r more inlet ports 21 opening into the interior "ofthe cylinder and'a` suitable check valve 22opening toward the interior of the cylinder,A carried` in suitable guid1`es-22y andhormally held seatedby a spring 23 and controlled as t0. its degree of opening bya stop 247 controls `the admissionV of airt'hrough the-passages121. vThe cyl-` inder wall is also perforated' between: theV ends thereof as at 25 by a combined lubricant and breathing port. "When the valve 22 isopen and the piston in mid position, there is a passage open from end to end through the cylinder and cap-17,I and during channeling thereis a gradual pumpin of air through the cylinderandcap yw ich serves as a cooling :medium'and therebytends to keep down thetemperature of the relatively movable parts.

As in practice 1t is often necessary to change the quantity of air which may be` admitted throughthe ports 21` to the lower side Voi' the piston 6, for the purpose of varyingthe degreeof cushioning, Ihave'prO- vided a suitable mechanism:` for tliejpurpose of permitting a largefor `small quantity of air to have access Yto the valve22V and so 'to the interior of the cylinder; The val've`22V extremity ofthe recess.` The plates 29and.

are each round andare traversed. by series ofwports 3 3, these ports in the plates 29A an'dBO being.' so spaced that it will be possible for the ports to be moved out of register with each other by arranging the plate 30 in a manner to be described with the ports thereof out of alinement with the ports in the plate 29. A suitable pin 34 holds the ported plate 29 against rotation. The plate 30 is provided with a slot 35 which permits the turning of the plate between certain limits, the limits of turning being such as to permit the ports 33 in the two plates to be brought into full register or to be brought entirely out of register with each other. rlhe plates may be provided with mating serrations 37 and the lower plate 30 may also have notches 39 therein with which projecting vportions 38 formed upon the spring member 3l are adapted to engage. It will be clear that if the spring is held against rotation, as may be done by notching it to receive the pin 34, the spring may serve as further locking means for the plate 30, while, if desired, the spring need not be fixed and simply by maintaining the serrations 37 interlocked with each other any tendency to relative rotation between the plates will be avoided. It will also be evident that, if desired, the serrations 37 may be omitted entirely and reliance placed upon the friction between the plates. The plate 30 is provided with a central depending boss or shank 40 upon which a wrench may be fitted for the purpose of turning the plate to bring the holes 33 in the plate 30 more or less into full communication with those in the plate 29. As shown, the plates are slightly spaced so as to prevent total interruption of air admission, but this may be accomplished lin other ways or wholly omitted under certain conditions if desired.

The mode of operation of my illustrative embodiment described herein will be readily apparent. It will be evident that, as the cylinder 5 is reciprocated upon rotation of the crank shaft l, the piston 6 will be thrown by the alternate compressions and releases of the air at opposite sides of the piston 6 as the cylinder reverses its direction of travel. It will be evident that there will be some leakage of air and that there will also be some air discharged through the port Q5 formed in the side of the cylinder for the admission of lubricant thereto. The degree of cushioning will also be regulated by the quantity of air that is admitted beneath the piston at each upward stroke. Accordingly, in very soft stone it may be necessary to use more than one of my improved controlling mechanisms to provide adequate inlet capacity, while in very hard rock it will be possible to entirely close all except one of these mechanisms and to largely close oil1 communication through the ports 33 in that one of them. In any event, it will be observed that by the employment of one or more of my improved regulating mechanisms, it will be possible to determine precisely the quantity of air which will be admitted into the lower end of the cylinder and so to vary the degree of cushioning with great nicety to snit any condition of channeling. It will be obvious that I am not limited to the form of spring which I have illustrated at 3l in Figures 2 and 4, but that any other form, for instance au annular bowed spring, a corrugated spring, or other constructions may be employed if desired.

lVhile I have in this application specilically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit orrtlle scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is 1. In a stone working machine, in combination, a cutting tool, actuating means therefor including a. reciprocable cylinder having a piston movable therein, said cylinder having lluid inlet means including a port, fluid outletmeans, and passage means for conducting luid to the opposite ends of said cylinder, an automatic valve for controlling fluid flow to said inlet port, and means for regulating fluid llow to said automatic valve.

2. In a stone working machine, in combination, a cutting tool, actuating means therefor including a reciprocable cylinder having a piston movable therein, said cylinder having an inlet opening and an outlet opening, and a by-pass extending to opposite ends ot said cylinder for conducting fluid from the inlet opening to said opposite ends, an automatic valve for controlling fluid flow through said inlet opening, and means for regulating the flow of fluid to said automatic valve.

3. In a stone working machine, in combination, a cutting tool, a power driven meinber, and means for transmitting power from said power driven member to said cutting tool includin a cylinder, a relatively movable piston tierein, and means for causing a substantially one-way flow of air through l said cylinder comprising a port at each end of said cylinder and arranged to be in communication at least during a part of the relative movement between said cylinder and piston in either direction, an inwardly opening check valve controlling one of said ports, and means for regulating the rate of fluid flow to said cheek valve.

4. In a stone working machine, in combination, a cutting tool, actuating means therefor including a reciprocable cylinder having a piston movable therein, said cylinder having a fluid inlet opening and a Huid outlet opening, and a by-pass connecting the opposite ends of said cylinder, an automatic valve 1,661,830 p s v 8 for controlling fluid flow through said inlet opening to said cylinder, said valve being automatically closed on relative movement of said piston and cylinder in one direction,

'- and mea-ns for regulating the flow of fluid inder having an inlet opening and an out-l let opening in the opposite ends'thereof respectively, means for intermittently connecting 'said openings, a check valve controlling fluid flow through one of said openings, and a manually adjustable throttle valve controlling the flow of fluid to said check valve whereby a maximum blow struck by saidtool occurs only during a minimum fluid cushion.

7. In a stone working machine, in combination, a cutting tool, actuating means therefor comprising a cylinder, means for reciprocating the same, and a piston movable in and relative to said cylinder and rigidly connected to said cutting tool; means for supplying air to both ends Vof said cylinder, and means for controlling said supply means to vary the resistance t-o relative movement between said cylinder and piston in both directions.

8. In a stone working machine, in conibination, a cutting tool, actuating means therefor comprising a cylinder, means for reciprocating the same, and a piston movable in and relative to said cylinder and rigidly connected to said cutting tool; inletl means for automatically supplying air to said cylinder on opposite sides of said piston, restricted outlet means for relieving pressure on both sides of said piston, and means for controlling the amount of air to said inlet means for varying vthe maximum pressures in said cylinder on both sides of said piston.

9. In a stone working machine, in combination, a cutting tool, actuating means therefor comprising a cylinder, means for reciprocating the same, and a piston movable in and relative to said cylinder and rigidly connected to said cutting tool; inlet means for admitting air to one end of said cylinder, means for conductingl `air from said end to the opposite end of the cylinder, exhaust means at `said opposite end, and means for regulating the amount of air supplied to said inlet means to vary the resistance to relative movement bet-Ween said cylinder and piston.

10. In a stone working machine, in comhina-tion, a cutting tool, actuating means therefor' comprising a cylinder, meansffor reciprocating the same, and a piston movable in and relative to ,said cylinder and rigidly connected to said cutting tool; an inlet opening tor admitting air to one end of said cylinder, an automatic valve in said opening, a restricted passage connectingthe` opposite ends of Said cylinder, av restricted exhaust port communicating with the end of said cylinder .opposite said inlet opening, and a valve for regulating the amount of air supplied to said inlet means to vary tlie resistancevto relative movement between said cylinder and piston.

In testimony whereof `I ailix my signa-` ture. v

HENRY I-I. MERCER tattili 

